diff --git a/descriptions/api.github.com/api.github.com.2022-11-28.json b/descriptions/api.github.com/api.github.com.2022-11-28.json
index 69da77e886..89b1bb611e 100644
--- a/descriptions/api.github.com/api.github.com.2022-11-28.json
+++ b/descriptions/api.github.com/api.github.com.2022-11-28.json
@@ -120558,6 +120558,7 @@
         "properties": {
           "sha": {
             "type": "string",
+            "nullable": true,
             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
           },
           "filename": {
diff --git a/descriptions/api.github.com/api.github.com.2022-11-28.yaml b/descriptions/api.github.com/api.github.com.2022-11-28.yaml
index 771e31337a..aaf4a0da2c 100644
--- a/descriptions/api.github.com/api.github.com.2022-11-28.yaml
+++ b/descriptions/api.github.com/api.github.com.2022-11-28.yaml
@@ -88621,6 +88621,7 @@ components:
       properties:
         sha:
           type: string
+          nullable: true
           example: bbcd538c8e72b8c175046e27cc8f907076331401
         filename:
           type: string
diff --git a/descriptions/api.github.com/api.github.com.json b/descriptions/api.github.com/api.github.com.json
index 69da77e886..89b1bb611e 100644
--- a/descriptions/api.github.com/api.github.com.json
+++ b/descriptions/api.github.com/api.github.com.json
@@ -120558,6 +120558,7 @@
         "properties": {
           "sha": {
             "type": "string",
+            "nullable": true,
             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
           },
           "filename": {
diff --git a/descriptions/api.github.com/api.github.com.yaml b/descriptions/api.github.com/api.github.com.yaml
index 771e31337a..aaf4a0da2c 100644
--- a/descriptions/api.github.com/api.github.com.yaml
+++ b/descriptions/api.github.com/api.github.com.yaml
@@ -88621,6 +88621,7 @@ components:
       properties:
         sha:
           type: string
+          nullable: true
           example: bbcd538c8e72b8c175046e27cc8f907076331401
         filename:
           type: string
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json
index f14a62163c..31728dcdc6 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json
+++ b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.json
@@ -210065,6 +210065,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -227598,6 +227599,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -262767,6 +262769,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -268482,6 +268485,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -273810,6 +273814,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -274355,6 +274360,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -274924,6 +274930,7 @@
                               "properties": {
                                 "sha": {
                                   "type": "string",
+                                  "nullable": true,
                                   "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                                 },
                                 "filename": {
@@ -275015,6 +275022,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -390399,6 +390407,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -422097,6 +422106,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -422357,6 +422367,7 @@
                     "properties": {
                       "sha": {
                         "type": "string",
+                        "nullable": true,
                         "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                       },
                       "filename": {
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml
index 17697ab920..af0c6e32b4 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml
+++ b/descriptions/api.github.com/dereferenced/api.github.com.2022-11-28.deref.yaml
@@ -53273,6 +53273,7 @@ paths:
                           properties:
                             sha:
                               type: string
+                              nullable: true
                               example: bbcd538c8e72b8c175046e27cc8f907076331401
                             filename:
                               type: string
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.deref.json b/descriptions/api.github.com/dereferenced/api.github.com.deref.json
index f14a62163c..31728dcdc6 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.deref.json
+++ b/descriptions/api.github.com/dereferenced/api.github.com.deref.json
@@ -210065,6 +210065,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -227598,6 +227599,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -262767,6 +262769,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -268482,6 +268485,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -273810,6 +273814,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -274355,6 +274360,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -274924,6 +274930,7 @@
                               "properties": {
                                 "sha": {
                                   "type": "string",
+                                  "nullable": true,
                                   "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                                 },
                                 "filename": {
@@ -275015,6 +275022,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -390399,6 +390407,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -422097,6 +422106,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -422357,6 +422367,7 @@
                     "properties": {
                       "sha": {
                         "type": "string",
+                        "nullable": true,
                         "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                       },
                       "filename": {
diff --git a/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml b/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml
index 17697ab920..af0c6e32b4 100644
--- a/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml
+++ b/descriptions/api.github.com/dereferenced/api.github.com.deref.yaml
@@ -53273,6 +53273,7 @@ paths:
                           properties:
                             sha:
                               type: string
+                              nullable: true
                               example: bbcd538c8e72b8c175046e27cc8f907076331401
                             filename:
                               type: string
diff --git a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
index 13bbf5f28f..f2491b7eac 100644
--- a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.json
@@ -255102,6 +255102,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -272635,6 +272636,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -310003,6 +310005,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -315718,6 +315721,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -321070,6 +321074,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -321615,6 +321620,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -322184,6 +322190,7 @@
                               "properties": {
                                 "sha": {
                                   "type": "string",
+                                  "nullable": true,
                                   "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                                 },
                                 "filename": {
@@ -322275,6 +322282,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -439988,6 +439996,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -471726,6 +471735,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -471986,6 +471996,7 @@
                     "properties": {
                       "sha": {
                         "type": "string",
+                        "nullable": true,
                         "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                       },
                       "filename": {
diff --git a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
index 142eeed0ea..b0b0d50464 100644
--- a/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.2022-11-28.deref.yaml
@@ -63824,6 +63824,7 @@ paths:
                           properties:
                             sha:
                               type: string
+                              nullable: true
                               example: bbcd538c8e72b8c175046e27cc8f907076331401
                             filename:
                               type: string
diff --git a/descriptions/ghec/dereferenced/ghec.deref.json b/descriptions/ghec/dereferenced/ghec.deref.json
index 13bbf5f28f..f2491b7eac 100644
--- a/descriptions/ghec/dereferenced/ghec.deref.json
+++ b/descriptions/ghec/dereferenced/ghec.deref.json
@@ -255102,6 +255102,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -272635,6 +272636,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -310003,6 +310005,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -315718,6 +315721,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -321070,6 +321074,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -321615,6 +321620,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -322184,6 +322190,7 @@
                               "properties": {
                                 "sha": {
                                   "type": "string",
+                                  "nullable": true,
                                   "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                                 },
                                 "filename": {
@@ -322275,6 +322282,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -439988,6 +439996,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -471726,6 +471735,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -471986,6 +471996,7 @@
                     "properties": {
                       "sha": {
                         "type": "string",
+                        "nullable": true,
                         "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                       },
                       "filename": {
diff --git a/descriptions/ghec/dereferenced/ghec.deref.yaml b/descriptions/ghec/dereferenced/ghec.deref.yaml
index 142eeed0ea..b0b0d50464 100644
--- a/descriptions/ghec/dereferenced/ghec.deref.yaml
+++ b/descriptions/ghec/dereferenced/ghec.deref.yaml
@@ -63824,6 +63824,7 @@ paths:
                           properties:
                             sha:
                               type: string
+                              nullable: true
                               example: bbcd538c8e72b8c175046e27cc8f907076331401
                             filename:
                               type: string
diff --git a/descriptions/ghec/ghec.2022-11-28.json b/descriptions/ghec/ghec.2022-11-28.json
index 7b584256ec..b22563e4e7 100644
--- a/descriptions/ghec/ghec.2022-11-28.json
+++ b/descriptions/ghec/ghec.2022-11-28.json
@@ -138579,6 +138579,7 @@
         "properties": {
           "sha": {
             "type": "string",
+            "nullable": true,
             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
           },
           "filename": {
diff --git a/descriptions/ghec/ghec.2022-11-28.yaml b/descriptions/ghec/ghec.2022-11-28.yaml
index 18265fa2c5..ba2e760e6c 100644
--- a/descriptions/ghec/ghec.2022-11-28.yaml
+++ b/descriptions/ghec/ghec.2022-11-28.yaml
@@ -101579,6 +101579,7 @@ components:
       properties:
         sha:
           type: string
+          nullable: true
           example: bbcd538c8e72b8c175046e27cc8f907076331401
         filename:
           type: string
diff --git a/descriptions/ghec/ghec.json b/descriptions/ghec/ghec.json
index 7b584256ec..b22563e4e7 100644
--- a/descriptions/ghec/ghec.json
+++ b/descriptions/ghec/ghec.json
@@ -138579,6 +138579,7 @@
         "properties": {
           "sha": {
             "type": "string",
+            "nullable": true,
             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
           },
           "filename": {
diff --git a/descriptions/ghec/ghec.yaml b/descriptions/ghec/ghec.yaml
index 18265fa2c5..ba2e760e6c 100644
--- a/descriptions/ghec/ghec.yaml
+++ b/descriptions/ghec/ghec.yaml
@@ -101579,6 +101579,7 @@ components:
       properties:
         sha:
           type: string
+          nullable: true
           example: bbcd538c8e72b8c175046e27cc8f907076331401
         filename:
           type: string
diff --git a/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.json b/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.json
index 78f8d76103..431b253a40 100644
--- a/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.json
+++ b/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.json
@@ -183250,6 +183250,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -200719,6 +200720,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -222497,6 +222499,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -228206,6 +228209,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -233114,6 +233118,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -233654,6 +233659,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -234218,6 +234224,7 @@
                               "properties": {
                                 "sha": {
                                   "type": "string",
+                                  "nullable": true,
                                   "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                                 },
                                 "filename": {
@@ -234309,6 +234316,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -323563,6 +323571,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -351900,6 +351909,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -352159,6 +352169,7 @@
                     "properties": {
                       "sha": {
                         "type": "string",
+                        "nullable": true,
                         "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                       },
                       "filename": {
diff --git a/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.yaml b/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.yaml
index 61e6872ce4..e8cb9a6cfd 100644
--- a/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.yaml
+++ b/descriptions/ghes-3.14/dereferenced/ghes-3.14.2022-11-28.deref.yaml
@@ -46768,6 +46768,7 @@ paths:
                           properties:
                             sha:
                               type: string
+                              nullable: true
                               example: bbcd538c8e72b8c175046e27cc8f907076331401
                             filename:
                               type: string
diff --git a/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.json b/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.json
index 78f8d76103..431b253a40 100644
--- a/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.json
+++ b/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.json
@@ -183250,6 +183250,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -200719,6 +200720,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -222497,6 +222499,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -228206,6 +228209,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -233114,6 +233118,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -233654,6 +233659,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -234218,6 +234224,7 @@
                               "properties": {
                                 "sha": {
                                   "type": "string",
+                                  "nullable": true,
                                   "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                                 },
                                 "filename": {
@@ -234309,6 +234316,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -323563,6 +323571,7 @@
                         "properties": {
                           "sha": {
                             "type": "string",
+                            "nullable": true,
                             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                           },
                           "filename": {
@@ -351900,6 +351909,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+                              "nullable": true,
                               "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                             },
                             "filename": {
@@ -352159,6 +352169,7 @@
                     "properties": {
                       "sha": {
                         "type": "string",
+                        "nullable": true,
                         "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                       },
                       "filename": {
diff --git a/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.yaml b/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.yaml
index 61e6872ce4..e8cb9a6cfd 100644
--- a/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.yaml
+++ b/descriptions/ghes-3.14/dereferenced/ghes-3.14.deref.yaml
@@ -46768,6 +46768,7 @@ paths:
                           properties:
                             sha:
                               type: string
+                              nullable: true
                               example: bbcd538c8e72b8c175046e27cc8f907076331401
                             filename:
                               type: string
diff --git a/descriptions/ghes-3.14/ghes-3.14.2022-11-28.json b/descriptions/ghes-3.14/ghes-3.14.2022-11-28.json
index ffbf0b7470..7ecc67d530 100644
--- a/descriptions/ghes-3.14/ghes-3.14.2022-11-28.json
+++ b/descriptions/ghes-3.14/ghes-3.14.2022-11-28.json
@@ -110650,6 +110650,7 @@
         "properties": {
           "sha": {
             "type": "string",
+            "nullable": true,
             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
           },
           "filename": {
diff --git a/descriptions/ghes-3.14/ghes-3.14.2022-11-28.yaml b/descriptions/ghes-3.14/ghes-3.14.2022-11-28.yaml
index feeae07ec7..d72b683df0 100644
--- a/descriptions/ghes-3.14/ghes-3.14.2022-11-28.yaml
+++ b/descriptions/ghes-3.14/ghes-3.14.2022-11-28.yaml
@@ -80594,6 +80594,7 @@ components:
       properties:
         sha:
           type: string
+          nullable: true
           example: bbcd538c8e72b8c175046e27cc8f907076331401
         filename:
           type: string
diff --git a/descriptions/ghes-3.14/ghes-3.14.json b/descriptions/ghes-3.14/ghes-3.14.json
index ffbf0b7470..7ecc67d530 100644
--- a/descriptions/ghes-3.14/ghes-3.14.json
+++ b/descriptions/ghes-3.14/ghes-3.14.json
@@ -110650,6 +110650,7 @@
         "properties": {
           "sha": {
             "type": "string",
+            "nullable": true,
             "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
           },
           "filename": {
diff --git a/descriptions/ghes-3.14/ghes-3.14.yaml b/descriptions/ghes-3.14/ghes-3.14.yaml
index feeae07ec7..d72b683df0 100644
--- a/descriptions/ghes-3.14/ghes-3.14.yaml
+++ b/descriptions/ghes-3.14/ghes-3.14.yaml
@@ -80594,6 +80594,7 @@ components:
       properties:
         sha:
           type: string
+          nullable: true
           example: bbcd538c8e72b8c175046e27cc8f907076331401
         filename:
           type: string
diff --git a/descriptions/ghes-3.15/dereferenced/ghes-3.15.2022-11-28.deref.json b/descriptions/ghes-3.15/dereferenced/ghes-3.15.2022-11-28.deref.json
index 5ef6c616bd..168a6ee140 100644
--- a/descriptions/ghes-3.15/dereferenced/ghes-3.15.2022-11-28.deref.json
+++ b/descriptions/ghes-3.15/dereferenced/ghes-3.15.2022-11-28.deref.json
@@ -187563,6 +187563,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -205088,6 +205089,7 @@
                             "properties": {
                               "sha": {
                                 "type": "string",
+                                "nullable": true,
                                 "example": "bbcd538c8e72b8c175046e27cc8f907076331401"
                               },
                               "filename": {
@@ -227294,6 +227296,7 @@
                           "properties": {
                             "sha": {
                               "type": "string",
+{"code":"internal","msg":"git-diff-tree: context deadline exceeded","meta":{"cause":"*fmt.wrapError"}}